Distribution Made to Limited Partner, Unit Redemption

No definition available.

Name:	nrp_DistributionMadeToLimitedPartnerUnitRedemption
Namespace Prefix:	nrp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Allocated to Preferred Unit Holders

+ References

No definition available.

+ Details

Name:	nrp_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterestAllocatedToPreferredUnitHolders
Namespace Prefix:	nrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of preferred units redeemed.

+ References

No definition available.

+ Details

Name:	nrp_PreferredUnitsNumberOfRedeemedUnits
Namespace Prefix:	nrp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481071/942-405-45-2

+ Details

Name:	us-gaap_DividendsPreferredStockCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482987/272-10-50-3

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The excess of (1) fair value of the consideration transferred to the holders of the preferred stock over (2) the carrying amount of the preferred stock in the registrant's balance sheet, during the accounting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480408/260-10-S99-2

+ Details

Name:	us-gaap_PreferredStockRedemptionPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis=nrp_Feb2023RedeemedUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerCapitalComponentsAxis=us-gaap_PreferredPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis=nrp_May2023RedeemedUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis=nrp_June2023RedeemedUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis=nrp_August2023RedeemedUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis=nrp_September2023RedeemedUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=nrp_CommonUnitholdersAndGeneralPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=nrp_PartnerGeneralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 4 - Common and Preferred Unit Distributions (Details Textual) - USD ($) $ in Thousands	1 Months Ended						3 Months Ended						9 Months Ended
	Sep. 30, 2023	Aug. 31, 2023	Jun. 30, 2023	May 31, 2023	Feb. 28, 2023	Feb. 28, 2022	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Allocation to unitholders							$ 2,936	$ 5,000	$ 6,700	$ 7,500	$ 7,500	$ 7,500	$ 14,568	$ 22,500
Preferred Stock Redemption Premium							17,083			(0)			$ 60,929	(0)
Preferred Units, Number of Redeemed Units (in shares)	(15,001)	(35,000)	(45,000)	(35,834)	(47,499)								(178,334)
Distribution Made to Limited Partner, Unit Redemption (in shares)						(19,321)
Feb 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash					$ 600
May 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash				$ 400
June 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash			$ 900
August 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash		$ 400
September 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash	$ 400
Common Unitholders And General Partner [Member]
Allocation to unitholders							$ (2,900)	$ (5,000)	$ (6,700)	$ (7,500)			$ (14,600)	$ (22,500)
Partner, General [Member]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest													2.00%